形容詞 renal:

1. of or relating to the kidneys
   同義詞：nephritic

1. People with renal diseases have to eat salt-free foods.
   患有腎臟疾病的人只能吃不含鹽的食物。

re.nal

adj.（形容詞）
Of, relating to, or in the region of the kidneys.
腎臟的：腎臟的，或腎臟區(qū)的

來源：
Late Latin rôn3lis
后期拉丁語 rôn3lis
from Latin rônôs [kidneys]
源自 拉丁語 rônôs [腎臟]